🎹 Neon Tiles — Jesus Loves Me

A neon-styled 4-lane rhythm game built around the beloved children's hymn "Jesus Loves Me" — the chart was transcribed directly from sheet music and carries the verse-and-chorus through its full stanza. Cyberpunk visuals with a cyan→magenta gradient palette, ambient drifting tiles on the start and game-over screens, and the Orbitron typeface dress the Sunday-school staple in arcade neon while keeping its quiet, hymnlike heart intact.

🎮 How to Play

• Tap / Click — Tap tiles on mobile, or click them with the mouse on desktop.
• Keyboard — Use A S D F for the four lanes (left → right).
• Hold notes — For taller tiles, keep the key/finger pressed until the tile clears.
• Burst tiles — One tile in the chart fires a quick two-note flourish from a single tap, capturing the song's only sub-quarter pickup figure.
• Pause — Space or P
• Mute / Unmute — M
• Quick start / restart — Press D while any overlay is showing.

✨ Features

🎵 Real Score, Real Pitch

• 16 measures of melody (the score's first 2 measures are an instrumental intro — stripped from the chart so play begins immediately on the first sung note "Jesus").
• Every note plays at its actual pitch in C major across the song's six-note diatonic range (C4 → C5).
• Tempo is ♩=90 in 4/4 time, with each game beat = one 4분음표 (667 ms) — the slowest tempo in the batch, sitting comfortably in hymn pulse where every quarter note has room to breathe.

🎶 One Tile per Quarter Beat

• The chart uses a 4분음표 슬롯 mode — 1 tile = 1 quarter note — so the visual rhythm reads exactly the way you'd count along: "Je-sus loves me, this I know..." one tap per syllable.
• 2분음표 phrase endings ("loves me", "this I know") land on 2-beat hold tiles, marking the natural sentence breath in hymn phrasing.
• A single burst tile at m14 captures the song's one sub-quarter ornament — the F♯ neighbor tone leading into "Yes, Jesus loves me." It's the chart's only moment of decoration.
• The final "loves me so" cadence has been shortened from an open whole note to a 점2분음표 + 4분쉼표 so the song lands with a clear rest rather than ringing into a void.

🚀 Progressive Difficulty + Cycle Flash

• BPM increases by +12.5% per cycle (90 → 101 → 114 → 128...). At a hymn base tempo, even cycle 4 stays inside singable territory.
• Each cycle is also transposed up by a whole step (2 semitones), lifting the song into ever-brighter keys.
• Cycle transition flash: every new cycle pops up a centered banner — CYCLE 2 / ♪ +2 · ⚡ +12% — with a scale-and-glow animation, so the moment you survive into harder territory feels earned.

💢 Visible Miss Feedback

• Tap on empty space, hit the wrong tile, release a hold too early, or let any tile fall off-screen — all trigger a red flash at the relevant tile (and a circle pulse at the tap point), held for 450 ms.
• Plays a dissonant low buzz with downward portamento so misses are clearly audible.
• The game ends after the miss display, giving you a clear "what just happened" beat.

🎨 Polished Neon Visuals

• Hand-tuned per-lane colors along a cyan → blue → purple → magenta gradient that matches the logo.
• Glowing tube borders, soft outer halos, and scanline textures only inside the active press zone so the tappable area is instantly readable on hold tiles.
• Ambient floating tiles drift continuously down behind both the start screen and the game-over screen.
• Animated "neon tile" START button that physically slides down the board into the game on press — no jarring screen transitions. Same treatment on the PLAY AGAIN button.
• Score-burst flash animation on every successful hit.

🧠 Smart Lane Distribution

• Lanes are picked dynamically rather than randomly: the algorithm avoids consecutive same-lane spawns and balances left vs. right side usage.

🎯 Forgiving Hold Timing

• Hold tiles only require 75% of the full duration — releasing slightly early still counts.
• The hold-progress fill uses a soft gradient fade at its top edge instead of a hard line, so there's no visible pass/fail boundary to fixate on.

🎼 Scoring

• 10 points per beat cleared (so a 2-beat hold = 20, a 3-beat 점2분음표 = 30).
• High score saved locally and shown on the start and game-over screens.

📱 Mobile-First Input

• Multi-touch support — different fingers on different lanes are tracked independently.
• Coordinate-based hit testing rather than lane-only, so taps register exactly where your finger lands.
• touch-action: none and user-scalable=no to prevent scrolling/zooming during play.
• Viewport sized in vw units (9:16 portrait) so it scales perfectly across phone screens.
• Mouse-up listener attached to window so releases register even if the cursor leaves the canvas.

🛠️ Tech Stack

• Pure HTML / CSS / JavaScript — zero dependencies, zero build step.
• HTML5 Canvas for the 360×640 game board with